First 1967 383 installed in a Barracuda

I'd be more interested in the Shipped Date on the IBM card, center top of card and last 4 columns below.

My 67 383's Shipping Order Number begins with 531, but the Shipped Date was actually 5/26.
Mine was an ordered car, same as yours, the motor was assembled on 5/23 and it was shipped Friday 5/26.

I wouldn't put much stock in the balance of the Shipping Order Number as mine ends in 02023.
Sequentially before the March 1st tag above, but scheduled 30 days after and shipped 25 days after.

I know of at least 3 other 67 383 cars built on 0301. Have yet to see one earlier, but have never seen an IBM card from one of those with the actual Shipped Date.

The latest I've seen is 602, iirc, but I thought I saw one later.